I have also seen some Linux [Ubuntu] devices show up as a New Device after applying all the updates/patches.

Question about that specific workstation you have, do you have a DNS A and PTR record for that device in your DNS records? I've seen mentioned around here before that [local] DNS records that aren't correct can cause issues.

I have also seen some Linux [Ubuntu] devices show up as a New Device after applying all the updates/patches.

Question about that specific workstation you have, do you have a DNS A and PTR record for that device in your DNS records? I've seen mentioned around here before that [local] DNS records that aren't correct can cause issues.